Grate-bar.



No. 694,60l.

Patented Mar. 4, I902. J. BARKER. GBATE BAR.

(Application filed June 6, 1901.)

2 Shpets-Sh'eet I.

(No Model.)

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No. 694,60I. Patented Mar. 4, I902.

.|. BARKER. GBATE BAR.

(Application filed June 8, 1901.)

(No Model.) 2Shoaia$heot 2.

' WITNESSES m vsuron 5} a i 5 w aw UNrTE SATES JAMES BARKER, OF PHILADELPHIA, PENNSYLVANIA.

GRATE-BAR.

SPECIFZIGATKON forming part of Letters Patent No. 694,601, dated March 4, 1902. Application filed'd'une 6,1901. Serial No. 63,364- (No model.)

1'0 all whom it may concern:

Be it known that I, JAMES BARKER, a citizen of the United States, residing in the city and county of Philadelphia and State of Penn sylvania, have invented certain new and useful Improvements in Grate-Bars, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to certain novel improvements in grate-bars,whereby simplicity of construction and efficiency of operation are attained.

The invention comprises a grate-bar whereof one end is beveled downward and provided in the beveled portion with a rib flush with the top of the bar, or substantially so, whereby when the bars are assembled in grate form the beveled portion will afford a space for the accumulation of ashes to protect the ends of the bars, and such rib will afford a bearing-surface for the slice-bar in the stoking operation, and thus obviate the otherwise liability of removing such accumulation du ring the operation.

The invention also comprises certain other novel features of construction,which,together with the features above indicated, will be hereinafter fully described and claimed.

In the drawings, Figure 1 is a plan of a grate-bar embodying my invention. Fig. 2 is a side elevation thereof. Fig. 3 is an under side view of the same. Fig. 4 is a longitudinal vertical section as on the line 4 4 of Fig. 1. Fig. 5 is an end view of the bar. Figs.

6 and 7 are transverse sections as on the lines 6 6 and 7 7, respectively, of Fig. 1. Fig. 8 is a plan of .a series of the bars assembled in grate form. Fig. 9 is a vertical section through a portion of a furnace equipped with my improved grate-bar.

A A represent two parallel bars arranged a suitable distance apart and provided along their upper edges with rows of laterally-projecting lugs or teeth a. Atintervals throughout the length of the bars two opposing teeth on the inner sides of the respective bars are united, as indicated at a, to afford a connection between the two bars, the remaining opposing teeth of the inner rows being a slight distance apart to provide spaces longitudinally of the grate-bar.

The two bars, at one end thereof, are connected by a stout crosspiece (1 cast integral therewith, and they are also connected by cross-pieces a located at or near the lower edges of the bars and below the lugs or teeth of the latter. Thus there is afforded below such lugs or teeth an uninterrupted passage, which, in conjunction with the longitudinal spaces between the opposing rows of teeth, insures free circulation of the air below and through the grate-bar. The ends of therespective bars A A are oifset 'at their lower edgesto rest upon the bearing-bars B in the furnace, such bearing-bars being so arranged that grate-bars may be supported thereon end to end in a manner to extend from the'front to the back of the firebox and also side by side to extend from side to side of the fire-box.

The cross-piece a of each grate-bar is provided. on its respective ends with an open socket a and tooth a each extending the depth of the cross-piece, whereby when the bars are disposed side by side, as seen in Fig. 8,the tooth a of one bar will register with the socket a of the adjacent bar. Thus the several grate bars will be locked together against endwise displacement, and yet a defective bar may at any time be readily and quickly takenout and replaced without disturbing the remaining bars.

The inner ends of the respective grate bars or sections are correspondingly stepped or offset, as at a, so that when the bars are arranged end to end the abutting stepped ends will be interlocked with each other,-thus not only avoiding independent lateral displacement of the contiguous ends of the bars or sections, but at the same time avoiding an uninterrupted space or line of separation across the middle of the complete grate. Hence when the bars are assembled the grate is practically an integral structure.

I preferably, though not essentially, pro vide the inner or abutting ends of the'gratebars with depending lugs or teats a which take against the inner sides of the bearingbars B, and thus prevent endwise separation of the said grate-bars.

Inasmuch as the cross-pieces a of the grate- 'bars take against the respective walls of the fire-box, such cross-pieces are preferably bevelcd, asindicated at (1 to aiford spaces for the accumulation of ashes,which protect the ends of the bars. To obviate the otherwise liability of the removal of such ashes by the slice-bar during the stoking operation, I provide the beveled portions (1 with vertical ribs a the upper edges of, which lie flush with the top of the grate, or substantially so.

The union or twin bar above described is cast in one integral piece, and all the bars entering into the construction of the complete grate are identical. Thus the bars are readily interchangeable.

I claim- 1. A grate-bar having a bevel extending from the top of the bar downward to the end thereof to provide a space for the reception of ashes for protection to the end of the gratebar, and ribs extending across said space and having their upper surfaces flush with the top of the grate-bar.

2. A union grate-bar comprising longitudinal bars, a cross-piece uniting said longitudinal bars at one end, said cross-piece having a bevel extending from the top thereof downward to the end of the grate-bar to provide a space for the reception of ashes and ribs extending across said space with their upper surfaces flush with the top of the grate-bar.

3. A grate-bar having a cross-piece joining the members thereof, said cross-piece having a bevel extending from the top thereof downward and ribs extending transverse of said bevel with their upper surface flush with the top of the grate-bar, said cross-pieces also being provided at one end with an open socket and at the other end with a corresponding tooth or projection, said socket and tooth or projection extending the depth of the crosspiece whereby a grate-bar may be readily replaced Withont disturbing other bars of the grate.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

.IA MES BARKER.

Witnesses:

ANDREW V. GROUPE, JOHN R. NOLAN. 

